I find it to be great, but I plan on rooting later anyways.
I can confirm (for me anyways), that the headphone jack issue is gone.
Before, 3 out of 10 pulls of my aux line to my car would result in no speaker or mic.
Now 10 out of 10, differing speeds of pulling it out, etc. No problems.
I hope it is the same for others as well.
Ok, my one issue at the moment:
I had the apk for the transparent news and weather widget. Now that it is part of 2.1, opening the apk in astro will only give option to launch or uninstall, and of course uninstall fails because it is part of the OS build now.
So if anyone knows who made this, I'm figuring we need another built for 2.1, or something to that effect.